CVE-2026-54514

jackson-databind: InetSocketAddress deserialization triggers eager DNS resolution (SSRF)

State: Published
Severity: 5.3 Medium
Published: Jun 23, 2026
Updated: Jun 25, 2026
Reserved: Jun 15, 2026

Description

jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.0.0 until 2.18.8, 2.21.4, and 3.1.4, JDKFromStringDeserializer constructed InetSocketAddress with new InetSocketAddress(host, port), which performs eager DNS name resolution for hostname inputs at deserialization time. An application that binds untrusted JSON into a type containing an InetSocketAddress field issues an attacker-chosen DNS query during readValue, before any application-level validation or connect logic. The fix uses InetSocketAddress.createUnresolved(host, port), deferring DNS to an explicit connect. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N	GitHub_M

Weaknesses

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Product	Versions
jackson-databindFasterXML	>= 2.0.0, < 2.18.8Affected >= 2.19.0, < 2.21.4Affected >= 3.0.0, < 3.1.4Affected

References

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